Discovery of New Ink for Passports and Currency Notes.

Discovery of New Ink for Passports and Currency Notes.

The CSIR (Council of Scientific and Industrial Research) and the NPL (National Physical Laboratory) has jointly discovered a new ink to combat the problem of counterfeiting of currency notes and fake printing of passports. According to the RBI 2018-19 annual report, the risk of duplication of notes, mostly Rs. 500 & Rs. 2000, has increased. The ink:

is developed on the phenomena of Phosphorescence and Fluorescence.

can change the colour of pigmentation after printing. The ink shows red colour when exposed to UV light, green colour when UV light is off, and white colour in ambient light.